Russia's Karen Khachanov defeated Canada's Felix Auger-Aliassime, the third seed, 6-7, 6-3, 6-2, 6-2 to reach the third round of the U.S. Open on Thursday. ^[1] The International Tennis Integrity Agency (ITIA) provisionally suspended Australian tennis player Nick Kyrgios after a sample collected at the ATP 250 of Mallorca in June tested positive for benzoylecgonine, a metabolite of cocaine. ^[2] Khachanov secured only his second top-10 win at a Grand Slam, having previously made a run to the U.S. Open semi-finals in 2022. ^[3] World number 50 Khachanov broke Auger-Aliassime's serve seven times on Louis Armstrong Stadium court and saved seven of the nine break points he faced. ^[4] Karen Khachanov, currently ranked No. 50, converted seven of 20 break points to defeat the third seed. ^[5] The match ended with a score of 6-7 (5), 6-3, 6-2, lasting three hours and 20 minutes. ^[6] Nick Kyrgios did not appeal the suspension and acknowledged the positive test in an Instagram post, stating he made a great mistake and would return after working on himself. ^[7] Stefanos Tsitsipas, the 53rd-ranked Greek tennis player, criticized the late timing of Kyrgios's suspension in a press conference following his victory over Arthur Fils at the US Open. ^[8] The World Anti-Doping Agency (WADA) confirmed the positive test result, and the suspension officially began on August 4. ^[9] Khachanov lost the opening set in a tiebreaker after sending a backhand long while chasing down an Auger-Aliassime volley, but then twice held at love to stay in the set. ^[10] Khachanov took a 3-2 lead in the head-to-head series against Auger-Aliassime following this victory. ^[11] Former champion Iga Swiatek advanced to the third round by defeating Nadia Podroska with a 6-3, 6-2 victory at the 2026 US Open. ^[12]